I like these slushies with the flavor of coconut water. My kids prefer pineapple or white grape juice. Choose what sounds appealing to you. For an adult version, a little Malibu rum or vodka is a fun twist.
4 cups cubed watermelon, frozen
2 1/4 cups coconut water, pineapple juice or white grape juice
Place half of the watermelon in the blender with about 2 cups of the liquid and blend.
Add the remaining watermelon and blend until smooth. Add the remaining 1/4 cup liquid to reach your preferred consistency.